Doffer-ring.



0. L. TAFT.

DOFFER RING.

APPLICATION FILED MAY 26, I913.

Patented May 4, 1915.

WWW 5 R 27. 26%170/110/ 3 fly 6 y E 4 171%) vney ORMAN L. TAFT, OFWORCESTER, MASSACHUSETTS.

DOZEFEB-RING.

Specification of Letters Patent.

Patented May a, 1915.

Application filed May 26, 1913. Serial No. 769,818.

T all whom it may concern:

Be it known that I, ORMAN L. TAFT, a citizen of the United States,residing at Worcester, in the county of Worcester and Commonwealth ofMassachusetts, have invented a new and useful Improvement inDofler-Rings, of which the following, together with the accompanyingdrawing, is a specification.

My invention relates to doifer rings for use in card clothing machinery.

One object of the invention is to provide an improved form of dofferring in which the face of the endless band which supports the teeth isformed without joints or splices.

In the doffer rings in use at present, the faces of the bands whichsupport the teeth are formed by splicing together the two ends of asuitable strip of material. The piercing of this band by the teeth asthey are placed in position is apt to injure the splice, thus making itnecessary to repair the splice. Even if not so injured, the splice oftenseparates more or less so as to allow the ends of the strip to turn upsufficiently to be caught and further damaged by the teeth on the maincylinder of the machine. After such a splice has separated suflicientlyto allow the ends of the band to turn up in this way, the further use ofthe ring is, of course, impracticable, at least until the defectivesplice has been repaired. By providing a ring with no splices or jointsin the face of the tooth supporting band, the objections referred to areovercome and the life of the ring is consequently much increased.

The invention is illustrated in the accompanying drawing in which-Figure 1 is a view of a dofier roll of a carding engine with a set of mydoffer rings carried upon the roll; Fig. 2 is a view of 4 the backingand the jointless facing of my improved dofi'er rings; Fig. 3 is a viewof the backing and facing after being placed together; and Fig. 4: is aview of a short section of the doffer ring after the teeth have beenplaced in position.

Like reference characters refer to similar parts in the differentfigures.

The dofier rings 1 made in accordance with my invention include teeth 2for transferring fibers of wool being carded from the main cylinder ofthe machine to the rub roll in a manner well known to those familiarwith the art. These teeth are supported and carried by a band or supportwhich is preferably formed in two sections, a backing 3 and a facing A.The backing is of leather, or other suitable material, and may be formedby joining the ends of a strip of such material by a splice or joint 5,this backing strip being of such length that it will fit properly aboutthe dofier roll 6 as shown in Fig. 1. The facing 4 may be of felt, orother suitable material, and, in accordance with my invention, it isformed in an endless band or ring without splices 01' joints. Such ajointless facing ring may be formed by weaving a seamless tube of theproper diameter and then cutting short transverse sections from thistube. The facing 4 is of such dimensions that it will fit properlyoutside the backing 3 as shown in Fig. 3, the facing and backing beingcemented securely together to form a support or carrier for the teethwhich are afterward placed inposition. Any form of teeth may be used,the commonest and best known being short U-shaped pieces of wire forcedthrough the band or support from the inside so that each wire forms twooutwardly projecting teeth. After being forced into position through thesupport, the teeth are sharpened by grinding. The teeth are insertedthrough both thicknesses of the ring, being arranged in staggeredrelation preferably, as is usual in devices of this class. The samemechanism for inserting such teeth, is used as is used when acontinuously moving fiat strip of ring material is being operated upon.However, in operating upon a hoop or ring of the character shown in thedrawings such mechanism must necessarily omit the insertion of a shortlength of the teeth to form the card clothing, and such short space ordistance must subsequently be filled with teeth inserted by hand.

While I have shown and described a twopart support or carrier for theteeth, I do not wish to be limited thereto, as it is within the scope ofthe invention to provide a supporting band or carrier for the teeth, theface of the band being without splices or joints, but the band beingotherwise of any form and construction and composed of any materialsdesired.

Having described one form of my invention, what I claim as new anddesire to secure by Letters Patent is:

1. As a new article of manufacture, a dofi'er ring comprising a supportfor a plu- -ing and facing and '10 backing and facing forming Copies ofthis patent may be obtained to:

it. A doifer ring including a leather back- 15 ing, a jointless feltfacing, the backing and facing forming a support, and teeth carried bythe support. p

5. A dofi'er ring including a leather backing, a jointless felt facingcemented to the 20 backing, the backing and facingrforming a support,and teeth carried by the support.

Dated this 22nd. day of May, 1913.

ORMAN L. vTAFT.

Witnesses:

PENELOPE COMBERBAGH, NELLLE WHALEN.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

